Improvement in rolls for rolling angle-iron



A. SWIFT &1. E. YURK.

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ALEXANDER SWIFT, OF CINCINNATI, OHIO, AND JAMES E. YORK, OF NEWPORT,KENTUCKY.

IMPROVEMENT IN ROLLS FOR ROLLING ANGLE-IRON.

Specification forming part of Letters Patent No. l 59,978, datedFebruary 16,1875; application led January 13, 1875.

To all whom lit may concern Beit known that we, ALEXANDER SWIFT, ofCincinnati, Hamilton county, Ohio, and JAMES E.YORK, of Newport,Campbell county, Kentucky, have invented a new and useful Improvement inRolls for the Manufacture of Angle-Iron, of which the following' is aspecication:

Our invention has especial reference to the rolls employed for makingthat kind of angleiron whose transverse section is characterized by thesymbols L., V, and U, respectively, according to whether its apex be aright or some other angle, or simply rounded; and our invention isdesigned to enable the workmen to produce angle-iron of uniformconsistence, strength, and iinish throughout, and free from cracks andfissures.

The accompanying drawing is a partiallysectioned elevation of a pair ofrolls which embody our invention, portions of the necks being brokenaway and the housings being omitted.

A is the lower, and B the upper, member of a pair of rolls on our plan,adapted to produce what is known as L angle-iron, or, in other words,angle-iron whose two blades or webs meet each other ata right angle. Thepasses or forming-intervals between the rolls are all, except the finalone, of the kind known as closed, or, in other words, are separated fromone another by collars a, preferably on the lower roll. They aredesignated in the order of their use, from left to right, by thenumerals 1,2, 3, 4, 5, 6, and 7, respectively. The pass l, whichreceives the rough pile, fagot, or billet, is relatively the most open,and bears the semblance of an inverted V, of rounded and very obtuseapex, preferably about one fourth, fifth, and sixth passes arethickened, as at X, at or about the centers of their curved portions.The object of this thickening is to aiiord a preponderance of metal atthose parts, in order to counteract the tendency to crack or separatealong the web in the iinal pass. Each pass is ot' greater horizontal,and less vertical, dimensions than its predecessor, and each, except thelast, presents the angle in the inverted position from that whichprecedes it.

In turning off the rolls the passes are formed at such relative radialdistances as tovgive the preponderating draft to the portions Z, whichforni the inner angles of the iron.

The pile is, of course, presented in the first pass with its laminationshorizontal, and so continued throughout the course, in the manner longcustomary in the manufacture of U- rails and other kindred forms.

Ve are aware that it has been proposed to roll angle-iron in passes,one-half of both sides of whose wings were to project, by anabruptangle, in a horizontal direction from the apex; but such form would bemanifestly impractt cable, the re-entrant angle or crease formed therebyin that part of the web, otherwise most liable Vto separate in the actof rolling, tending to produce iiaws and rifts, which destroy or impairthe inerchantable quality of the iron.

We claim as new and of our invention- A pair ot' rolls for makingangle-iron, whose several grooves are so formed as to successivelyimpart to the pile or bar the forms, iirst, of an obtuse or iiattened V,having rounded apex; second7 the same, with outcurved edges; and, third,provision for excess of metal at the centers of the curves, as shown infourth, iifth, and sixth passes, the passes being alternately invertedand successively less obtuse, terminating with the nishingpass 7,substantially as and for the purpose set forth.

In testimony of which invention we hereunto set our hands. Y

ALEXANDER SWIFT. JAMES EDWIN YORK.

Attest:

FLAMEN BALL, J r., GEO. H. KNIGHT.

Erre.

